Can I use the ST-3/XT3 on a 5S installations?
Useful links:
Product page: https://probewell.com/our-products/portable-wireless-site-testers/st-3-xt3-site-tester/
Connection Guideline: https://probewell.com/wpsite/wp-content/uploads/2020/06/PW_XT-Series_Eng_Connection-Guidelines.pdf
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Can I use it whitout accessories? How many accessories can I use with?
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